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Priority to JP1363280UpriorityCriticalpatent/JPS6340227Y2/ja
Priority to GB8102493Aprioritypatent/GB2068419B/en
Priority to US06/229,850prioritypatent/US4372134A/en
Publication of JPS56116974UpublicationCriticalpatent/JPS56116974U/ja
Application grantedgrantedCritical
Publication of JPS6340227Y2publicationCriticalpatent/JPS6340227Y2/ja